/// <summary>
/// Calculates GCD for two or more integer numbers using Stein algorithm. Out parameter returns method execution time
/// </summary>
/// <param name="executionTime">method execution time in milliseconds</param>
/// <param name="numbers">input numbers for calculation</param>
/// <returns>GCD for two or more integer numbers </returns>
public static int GetSteinGCDWithWatch(out long executionTime, params int[] numbers)
{
GetGCD getGCD = GetSteinGCD;
return(CheckConditionsAndFindGCDWithWatch(out executionTime, getGCD, numbers));
}
/// <summary>
/// Calculates GCD for two or more integer numbers. Out parameter returns method execution time
/// </summary>
/// <param name="executionTime">method execution time in milliseconds</param>
/// <param name="getGCD">delegate with target method</param>
/// <param name="numbers">input array</param>
/// <returns>great common divisor</returns>
private static int CheckConditionsAndFindGCDWithWatch(out long executionTime, GetGCD getGCD, params int[] numbers)
{
getGCD(numbers);
var watch = System.Diagnostics.Stopwatch.StartNew();
int result = getGCD(numbers);
watch.Stop();
executionTime = watch.ElapsedMilliseconds;
return(result);
}
